A scopolamine patch, like other medications, can cause side effects. Side effects from scopolamine use include dry mouth, urinary retention, visual changes and drowsiness. Scopolamine should generally not be used in conjunction with other medications or in patients with glaucoma, seizures, psychosis, intestinal obstruction, bladder obstruction or the elderly. People who have had hypersensitivity or allergic reactions to scopolamine or other belladonna alkaloids should not use the medication. Scopolamine and alcohol should not be used together. Any questions regarding scopolamine’s side effects should be discussed with one’s pharmacist and medical provider before use.